Security readout for executives and security teams
Plain-English summary
Firefox 142 through versions before 144.0.2 contained a memory-safety flaw that could let an already-compromised child process attack the GPU or main browser process. Mozilla states this may have enabled escape from Firefox’s child-process sandbox, potentially increasing the impact of an earlier compromise.
Executive priority
Treat remediation as urgent because the issue could turn a contained browser compromise into broader process compromise. Accelerate Firefox updates, especially on endpoints handling sensitive information. There is no supplied evidence of active exploitation, so urgency is driven by potential impact and the availability of a fixed release.
Technical view
WebGPU-related IPC calls could trigger a use-after-free in Firefox’s GPU or browser process. The weakness is classified as CWE-416 and could potentially cross a sandbox boundary. Mozilla fixed it in Firefox 144.0.2. The supplied CVSS 3.1 score is 9.8, although the described compromised-child-process prerequisite suggests exploitation would likely form part of a vulnerability chain.
Likely exposure
Exposure is likely on Firefox installations running version 142 or later but earlier than 144.0.2. The supplied sources do not identify other Mozilla products, platforms, or configurations as affected. Organizations should verify actual deployed versions rather than infer exposure from the supplied affected-version field, which lists the fixed release.
Exploitation context
The flaw is not listed as a CISA KEV in the supplied bundle, and the cited evidence does not establish active exploitation. Exploitation requires control of a Firefox child process, making this most relevant as a potential second stage that could weaken sandbox containment after another compromise.
Researcher notes
The public description does not disclose triggering details, exploitability constraints beyond a compromised child process, or confirmed sandbox escape. The CVSS vector indicates network reachability without privileges or interaction, but the narrative describes a prerequisite compromise; assess it as a likely chain component. Avoid assuming reliable code execution or confirmed exploitation.
Mitigation direction
- Update Firefox to version 144.0.2 or later.
- Prioritize managed endpoints still running Firefox 142 through 144.0.1.
- Check Mozilla’s advisory for any subsequent remediation guidance.
- Apply normal browser update enforcement where users can defer updates.
Validation and detection
- Inventory Firefox versions across managed endpoints.
- Confirm no installations remain between Firefox 142 and 144.0.1.
- Verify updated browsers report version 144.0.2 or later.
- Review update-management records for failed or deferred Firefox deployments.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-416: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2025-12380 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://bugzilla.mozilla.org/show_bug.cgi?id=1993113CVE reference, mozilla
- https://www.mozilla.org/security/advisories/mfsa2025-86/CVE reference, mozilla
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.